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Equity (Tables) | 3 Months Ended
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Mar. 31, 2022
Equity |
Summary of Changes in Accumulated Other Comprehensive Loss by Component | Changes in accumulated other comprehensive loss by component for the three months ended March 31, 2022 and 2021 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Other-Than- | ​ | ​ | ​ | ​ | ​
​ | ​ | Minimum | ​ | Temporary | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Impairment of | ​ | Interest Rate | ​ | ​ | ​
​ |  | Liability |  | Investment |  | Derivatives |  | Total
Balance, December 31, 2021 | ​ | $ | (16,419) | ​ | $ | (3,298) | ​ | $ | (9,363) | ​ | $ | (29,080)
Gains arising during period | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,070 | ​ | ​ | 6,070
Amounts reclassified from accumulated other comprehensive loss | ​ | ​ | (86) | ​ |  | 53 | ​ |  | 3,949 | ​ |  | 3,916
Net other comprehensive income (loss) | ​ |  | (86) | ​ |  | 53 | ​ |  | 10,019 | ​ |  | 9,986
Balance, March 31, 2022 | ​ | $ | (16,505) | ​ | $ | (3,245) | ​ | $ | 656 | ​ | $ | (19,094)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Other-Than- | ​ | ​ | ​ | ​ | ​
​ | ​ | Minimum | ​ | Temporary | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Impairment of | ​ | Interest Rate | ​ | ​ | ​
​ |  | Liability |  | Investment |  | Derivatives |  | Total
Balance, December 31, 2020 | ​ | $ | (26,623) | ​ | $ | (3,509) | ​ | $ | (27,819) | ​ | $ | (57,951)
Gains arising during period | ​ | ​ | 1,436 | ​ | ​ | — | ​ | ​ | 602 | ​ | ​ | 2,038
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 8 | ​ |  | 53 | ​ |  | 4,001 | ​ |  | 4,062
Net other comprehensive income | ​ |  | 1,444 | ​ |  | 53 | ​ |  | 4,603 | ​ |  | 6,100
Balance, March 31, 2021 | ​ | $ | (25,179) | ​ | $ | (3,456) | ​ | $ | (23,216) | ​ | $ | (51,851)

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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